Clunking Noise During Turns in a 2021 Toyota Highlander

Potential Causes

1. Worn CV Joints: The constant velocity (CV) joints can wear out and cause noise during turns.
2. Suspension Issues: Problems with suspension components, such as struts, bushings, or control arms.
3. Loose or Damaged Exhaust Components: Exhaust systems can shift during turns, causing noise.
4. Steering System Problems: Issues with the steering rack, tie rods, or other components.
5. Wheel Bearing Issues: Worn wheel bearings may create noise during turning.

Step 1: Visual Inspection

1. Tools Required: Flashlight, jack and jack stands, wheel chocks.
2. Procedure:
   • Park the vehicle on a level surface and engage the parking brake.
   • Inspect the CV joints for any visible grease leaks or damage.
   • Check the suspension components for signs of wear or damage (look for cracks, rust, or broken parts).
   • Examine the exhaust system for loose components.
   • Inspect the wheel bearings for play by lifting the front of the vehicle and shaking the wheel.

Step 2: Listen While Turning

1. Tools Required: None.
2. Procedure:
   • Drive the vehicle in a safe area and make tight left and right turns.
   • Pay attention to the noise's location (front left, front right, etc.).
   • Note if the noise changes with the steering angle or vehicle speed.

Step 3: Check Fluid Levels

1. Tools Required: Dipstick (if necessary), funnel.
2. Procedure:
   • Check the power steering fluid level.
   • Inspect for any leaks in the power steering system.

Step 4: Test Drive

1. Tools Required: None.
2. Procedure:
   • Take the vehicle for a test drive and replicate the noise.
   • Note any related symptoms such as vibrations or changes in handling.

Repair Instructions

Repair Option 1: Replace Worn CV Joints

1. Tools Required: Socket set, torque wrench, pry bar, CV joint puller (if needed).
2. Procedure:
   • Raise the vehicle using a jack and secure it with jack stands.
   • Remove the front wheel on the side with the noisy CV joint.
   • Disconnect the brake caliper and rotor to access the CV joint.
   • Remove the axle nut with a socket and breaker bar.
   • Use a CV joint puller to remove the axle from the hub.
   • Replace the CV joint with a new one and reassemble in reverse order, ensuring all connections are torqued to manufacturer specifications.

Repair Option 2: Replace Worn Suspension Components

1. Tools Required: Socket set, torque wrench, ball joint separator, strut spring compressor (if necessary).
2. Procedure:
   • Raise the vehicle and secure with jack stands.
   • Inspect individual suspension components like control arms, struts, and bushings.
   • If any component is damaged, follow the manufacturer's repair guide to remove and replace that component.
   • Reassemble and torque all fasteners to specifications.

Repair Option 3: Tighten or Replace Exhaust Components

1. Tools Required: Wrench set, possibly a torch for rusted components.
2. Procedure:
   • Inspect the exhaust system for loose hangers or damaged sections.
   • Tighten any loose bolts or replace damaged hangers.
   • If necessary, replace any damaged exhaust sections.

Repair Option 4: Inspect and Replace Wheel Bearings

1. Tools Required: Socket set, torque wrench, bearing puller.
2. Procedure:
   • Raise the vehicle and remove the wheel.
   • Remove the brake caliper and rotor to access the wheel hub.
   • Use a bearing puller to remove the old bearing.
   • Install the new bearing and reassemble the wheel hub, ensuring all fasteners are properly torqued.

Conclusion

After following the above diagnostic steps and performing the necessary repairs, the clunking noise during turns should be resolved. If the problem persists, further inspection of other components may be necessary, possibly requiring professional assistance. Always refer to the vehicle’s service manual for specific torque specifications and procedures.